How to make LCD monitor run at non-standard resolution - Xwindows

This is a discussion on How to make LCD monitor run at non-standard resolution - Xwindows ; I have an ACER LCD monitor with maximum resolution of 1440x900 which
I have only been able to make work at 1280x1024. The monitor does
work well at 1280x1024, but there is some horizonal stretching of
images. I have tried ...

How to make LCD monitor run at non-standard resolution

I have an ACER LCD monitor with maximum resolution of 1440x900 which
I have only been able to make work at 1280x1024. The monitor does
work well at 1280x1024, but there is some horizonal stretching of
images. I have tried constructing some custom mode lines for
/etc/xorg.conf (see below), but none have worked so far.
Does anyone know how to get the monitor and video card to work at
1440x900?

xorg.conf works with both startx and startkde, just not in 1440x900 res.
The Xorg ati driver selected during configuration does not work at all
with this monitor. The Xorg vesa driver works at 1280x1024, but not at 1440x900.